Furnace



C. ROUDY.

FURNACE. APPLICA'i'lON FILED OCT. 22, 1918.

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C. ROUDY.

FURNACE.

APPLICATION FILED OCT. 22. 1918.

M l 1 n nn on v p I u q 1 1 UNITED STATES PATENT OFFICE.

CHARLES ROUDY, 0F GRAVILLE-STE-HONORINE, FRANCE, ASSIG-NOR '10 TRE- FILERIES & LAMINOIRS DU HAVRE, ANCIENS ETABLISSEMENTS LAZARE VVEILLER, SOCIETE COOPERATIVE DE RUGLES ET LA CANALISATION ELEG- TRIQ'UE REUNIS, OF PARIS, FRANCE, A CORPORATION OF FRANCE.

FURNACE.

Specification of Letters Patent.

Patented Dec. 28, 1920.

To aZZ whom it may concern.

Be it known that I, CHARLES RoUDY, engineer, of 1 Rue Lazare Weiller, at Graville- Ste-Honorine, Department of the Seine Infrieure, in France, citizen of the French Republic, have invented certain new and useful Improvements in or Relating to Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improvement in or modification of an invention for which a Patent No. 1,281,8t3 was granted Oct. 15, 1918, in which in a furnace, in combination with a traveling grate, there is pro vided a fire bridge comprising a steel tube let into the side walls of the furnace, carrying at one of its ends a steam injector, not shown. This tube is provided with holes 1 1 directed toward the front of the grate through which the mixture of air and steam escapes. Around the tube is arranged a series of rings having on their circumference openings through which the air coming from the central tube can escape and blow into the layer of clinker stopped by the fire bridge. In the former arrangement it will be recognized that the excess air blown in under the grating, as well as that coming from the fire bridge and from the hopper, passed directly to the hot gases surrounding the boiler or boiler elements and mixed with them.

The object of the present improvement is to form and arrange between the bridge wall and the fire bridge, a wall or partition of movable elements and a closure in the form of a dumping plate, between the bridge wall and partition with a veiw to obviating or reducing to a minimum the disadvantages hereinbefore referred to, and of using the said partition as an inclined plane for the purpose of causing the cinders to fall from the fire bridge on to the dumping plate and from the latter into the hopper.

The invention is described below in de tail with reference to the accompanying drawing which represents diagrammatically, by way of example, one constructional form of the improvement specified.

Figure 1 shows partially in elevation and partially in section with the fire bridge, dumping plate and part of Fig. 1.

In the drawing the same parts are indicated by reference numerals corresponding to those employed in the main patent.

In the drawing: 1 is the layer of fuel arranged on the traveling grate 3. The fire bridge which is cooled by the moist air from the steam blower or other equivalent device, includes a steel tube 6 of considerable thickness supported at its ends in the walls of the furnace. Around tube 6 is arranged a series of cast iron rings 16 having over the whole of the periphery conical openings 17 through which the air coming from the central tube 6 escapes and blows into the layer of clinker stopped by the fire bridge. The rings 16 rest normally on the upper part of the tube 6 and are located in this position some millimeters from the surface of the grate. When a slightly large body presents itself, carried along by the grate bars, one or more rings are raised and allow this body to pass which falls to the rear of the grate into the ash pit, the rings then resuming their normal position. The movement of the grate from front to rear causes the rings to rotate so that the same points of each ring are not always in contact with the fire. The clinkers held back which would seek to stick to these rings are detached by this movement. On the other hand, the: liberated clinkers tend to fall back and retur to the front of the grate, which produces a kind of stirring action which livens up the combustion of the last portions of the coal.

In order to prevent the excess of air blown in under the grate, and also that which comes from the fire bridge and from the hopper, from passing into the boiler zone as hereinbefore mentioned, there is arranged between the two vertical walls of the furnace a partition 21 consisting of separate similar elements, each supported at one end and capable of oscillating about a cross bar 20 and resting at the other end on the fire bridge. These elements are very close a part of the grating the partition and the Flg. 2 is a plan of a together, so as to prevent, as far as possible,

the passage of air, but they can rise with the rings of the fire bridge. These elements taken as a whole, adopt the form of an in clined plane, for the purpose of enabling the cinders passing over the fire bridge to fall easily on to the dumping plate 22. The dumping plate 22 is placed over the hopper 24' and between the partition 21 and the bridge wall 19 and the said dumping plate is operated from the outside by means of a shaft 23. The cinders which still contain some part of unburnt fuel settle on the dumping plate and end by burning there before falling into the hopper 24.

It will be seen that, by reason of the arrangement of the partition 21 and the dumping plate 22 between the fire bridge and the bridge Wall, the excess of air blown in under the grate and that coming from the fire bridge and from the hopper, is pre vented from passing into the boiler zone and consequently the cooling of the partition 21 by moist air and the heating of the boiler may be efiected under the most favorable conditions.

I What I claim is:

In a furnace having a progressive feed grate and bridge Wall, the combination with a cylindrical fire bridge composed of a series of abutting radially movable rings, of a partition consisting of a plurality of pivoted and independently movable abutting elements resting on said rings, said partition extending downwardly from the fire bridge toward the bridge wall and a dumping plate comprising a closure positioned between the partition and bridge wall.

In testimony whereof I afiix my signature;

CHARLES ROUDY. 

